I am not sure about the food back then, but I know that the business was rechristened as a stand for hamburguers
Well first they opened as just a restaurant, but later re branded to a hamburger stand.  I doubt back then the food looked anything like what it does today though.
I really love McDonald's. They have some really good food, Do you know about them? Yes I do, I know that it was established in 1940 in San Bernardino Wow way back in the 40's? Thats wild. What kind of food did they have back then, was it the same stuff served today at McDonald's?
They rechristened their business as a hamburger stand.
Я очень люблю McDonald's. У них действительно вкусная еда, вы знаете о них? Да, я знаю, что он был основан в 1940 году в Сан-Бернардино Ничего себе, в далекие 40-е? Это дико. Что за еда была тогда, в McDonald's подавали то же самое, что и сегодня?
Они переименовали свой бизнес в киоск с гамбургерами.